question on movement of stars from perspective of being on mars.

[ncc1701d]

generally
if standing on surface of Mars, do the distant stars on celestial sphere move over head in one mars sol day in a uniform speed like it does when standing on earth?
Not sure if the more eliptical orbit of mars would effect how fast they move in sky or if you can negate that because distance stars are so super far away.
The question is only refering to speed overhead not their location or what season it is.
thanks

 

[Keithth G]

The rate of movement of the apparent position of the stars in the sky - whether on Earth or Mars - is, to a very good approximation, directly proportional to the rate of rotation of the planet around its axis - a quantity that is usually regarded as a constant.

Because of the finite speed of light (300,000 km/s), there is a very week impact of the planet's orbital speed (~30 km/s) around the Sun called the 'aberration of light' which very slightly changes the apparent position of a star in the night sky. But unless you are doing high precision astrometry, you can usually ignore this.

Although the position of the Earth or Mars in its orbit will introduce a parallax shift in stellar position for nearby stars, for most stars more distant than a few parsecs, this interstellar distances are so large that the seasonal parallax shift is negligible.

 

[sorindafabico]

generally
if standing on surface of Mars, do the distant stars on celestial sphere move over head in one mars sol day in a uniform speed like it does when standing on earth?
Not sure if the more eliptical orbit of mars would effect how fast they move in sky or if you can negate that because distance stars are so super far away.
The question is only refering to speed overhead not their location or what season it is.
thanks

I'm assuming a naked eye observer.

Yes, they move like in the Earth sky, because their daily movement is related to the rotation of the planet. We can assume with a reasonable precision that the rotation velocity is constant for both Earth and Mars in a human lifetime.

However, the Martian sky has some differences: the position of the planets is obviously different and Polaris isn't the north pole star, because the rotation axis of the planet points towards another direction. That is, they move on a daily (sol) basis like here on Earth, but around a different point, because the celestial poles are in different constellations - but the shape of the constellatios is the same.

If you're interested, you can simulate both Earth and Martian skies using Stellarium.

 

[kamaz]

generally
if standing on surface of Mars, do the distant stars on celestial sphere move over head in one mars sol day in a uniform speed like it does when standing on earth?

Yes.

Not sure if the more eliptical orbit of mars would effect how fast they move in sky or if you can negate that because distance stars are so super far away.

Because Mars orbit is larger then stellar parallax observed on Mars will be larger. This is however of no practical importance (unless you are trying to measure the Universe).

More elliptical orbit means that the Sun, as seen from Mars, will traverse different signs of the Zodiac with different speed. This effect would be large enough to be measured using Stone Age technology (i.e. Stonehenge) and would really complicate the lives of Martian astrologers. (It confused our astrologers so much that they ultimately discovered heliocentrism.)

 

[ncc1701d]

Thanks for all responses. They are very helpfull.